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many mineralogical studies classify it closer to orbicular chalcedony or silicified rhyolite
Large freeforms
They’re harder to find compared to more widespread agate sources
modern crystal decor
apophyllite calcite association
Bivalve (Pelecypoda) Fossil Sea Shell with Chalcopyrite | Mineralized Fossil Specimen | Indonesia China many mineralogical studies classify itThis exceptional bivalve (Pelecypoda) fossil sea shell from Indonesia is a striking fusion of deep geological time and mineral transformation. Once a living marine organism, this shell has been preserved through fossilization and later enhanced by the natural crystallization of chalcopyrite, creating a stunning contrast between ancient biological form and metallic mineral growth. The fossil retains clear bivalve morphologyribbing, curvature, and shell
US$ 221.66
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